Oil burner



Jan. 9, 1923. 144mm,

W. R. RAY. OIL BURNER.

FILED APR. 1. 1919. 2 SHEETS-SHEET l.

N WW WWW; L2H,

ATTORNEY Jan. 9, 1923. L L-41,6300

V w. R, RAY.

OIL BURNER. FILED APR, 11 I919- 2SHEETS.SHEET Z.

ATTORNEY li e-tented Jarrod,

Application filed a ril 1,1919. Serial No. 286,755.

- To all whom it may concern Be it known that I, WILLIAM R. RAY, acitizen of the United States, residing at San Francisco, in the countyof San Francisco and State of California, have invented new and usefulImprovements in Oil Burners, of

which the following is a specification.

This invention relates to oil burners, and particularly to improvementson the structure shown in my copending application entitled Oil burner,filed January 15,1919, Serial N 0. 271,287.

is to provide an oil burner of v by the combined action of centrifugalfogce,

steam and air, and particularly a note'l ployed .is induced by aninduction nozzle which also serves the function of imparting a swirlingmovement to the air in a direction opposite to the rotation of thecentrifu:

gal fuel atomizer. 1

Further objects will hereinafter appear. The invention consists of thepartsand the construction, combination and arrangement of parts ashereinafter more fully described and claimed, having reference to. the

accompanying drawings, in which Fig. 1 is a side elevation of theburner,"

partly in section Fig. 2 is an end view of the burner; I Referring tothedrawings in detail, A

indicates an atomizing cup supported by a hollow shaft 2 which isjournaled in ball bearings 3 supported'by-a centrifugal bearing member 4which is secured by means of bolts 5 and an annular flange 6 to an endplate 7. Surrounding the atomizing cup A and the bearing membersupporting the shaft '2, is a tapered nozzle 8. This nozzle is securedand supported by the end plate 7 or may be cast integral therewith, asshown.

Also supported by the plate member 7 is a fluid actuating turbinegenerally indicated with turbine blades 11. Any suitable form of fluidor steam under pressure is admitted to a steam chest 12 formed withinthe hous ing 9 and it escapes from said chest through a series of nozzleopenings 13 mounted adcup is cut away, structure whereby the atomizlngair em plication referred to jacent the blades of the rotor. Rotarymovement is thus imparted and the steam after escaping into-the housing9 may be removed by means of an exhaust pipe or similar means not hereshown. The rotor 10 is secured to the hollow shaft 2 and thereforeserves the function of transmitting rotary cured at one end as at 15, inthe forward QIIdOf the housing 9 and extends through the hollow shaftand enters the atomizing ,cup, as shown. Theportion entering the oil tofreely escape into the cup and it is otherwise provided-with an end cap17 which restricts the escape of oil and furthermore serves the functionof evenly distributingthe same within the cup, as has previously beendescribed in my co-pending aphereinabove.

The oil-to be the forward end of the pipe and is thus de-' livered tothe atomizer or cup A. The high speed of resolution of the cup, which inactual practice often exceeds three or four thousand revolutions perminute," produces a centrifugal force which isso the oil forms a thinfilm on the interior surface of the cup. It is at the) same time forcedoutwardly, due to the flare or taper of the cup, and thereforedischargesrat right angles to the longitudinal axis of the cup when itleaves the outer annularlip of the cup. In fact, an annular sheet of oilis ejected which is soflhighly atomizedjthat it appears-more like a mistor fog than the vis to the atomizing cup by means; of a stationarypipe-14. This pipe is se- One of the objects of the present invention therotary type from which the oil is ejected and atomized atomized andburned, may -.be delivered to the stationary pipe 14: under as at 16, topermit the crude 1 great that cous oil originally delivered to the cup.

directly accomatomizplished by providing the tapering nozzle 8 and asecondary nozzle 18. This nozzle is arrangedat the rear end of the mainnozzle 8 and at one side thereof, see particularly Fig. 2. l

Projecting into'the lower end of the nozzle 18 is a compound inductionnozzle t, consisting of a. steam nozzle 19 and a pair ofsuperimposed'nozzles' QO'and 21. Steam or other fluid under pressuredelivered to the nozzle 19 and passing'through the nozzle 21,'induces aflow of air-therethrough.'

The air and steam escaping from the mouth of nozzle 21 and passingthrough the mouth of the exterior nozzle 22,;induees a secondary flow ofair through the nozzle 22 and the air and steam finally discharging fromthe exterior nozzle 22 and entering the main nozzle 8 through the lowerextension 18, induces an additional flow of air through the extension18. A great quantity of air is thus induced by the action of the singlefluid actuated nozzle 19 and as the combined mixture of steam and air"induced thereby through the. nozzles 21, 22 and the extension 18, isdelivered tovone side of the inain nozzle 18, it can readily be seenthat a swirling movement will beimparted to the mixture before it ispermitted to escape through the forward end of the main nozzle 8. Theswirling movement thus imparted is in a direction opposite to therotation of the atomizing cup A and the velocity imparted by the-steamnozzle 19 is so great that the mixture, when discharging from the mainnozzle 8, will instantly pass through the atomized oil ejected by thecup A, thus carrying it forward into the furnace. It

will, at the same time, produce a secondary 40" at omizing action byfurther breaking up the 'oilparticles and it also produces ahomogeneousmixture of air, steam and oil which i is highly combustible andinstantly ignited when enteringthe furnace.

The important feature of the present invention is the provisioniof asingle induction nozzle which is adapted to induce a sufficient quantityof air to produce ahomogeneous combustible mixture of air and oil andwhich will also impart sufficient velocity to the air to permit this toact as a secondary atomizing agent.

The second important feature of -the invention is the positioning ofsaid nozzle at one side of the main nozzle 8 so that a swirlingmovement. may be imparted to the air in a directionflopposite to. therotation of the atomizing cup. This is of great importance as, itfurtherin'creases the atomizing and mixing action desired,

YVhilea more or less specific form of induction nozzle is here-shown, Iwish it understood that any type of injector may be employed; similarly,that the materials and finish of the several parts forming the burnermay be varied to suit, different installments and applications.

Having thus described my invention, what I claim and desire to secure byLetters Patent is 1. The combination .with a centrifugal atomizer andmeans for delivering fuel thereto ,--of,-a main nozzle surrounding theatomizers ain nozzle being open at one end and cl (1; at the oppositeend, an air inlet extension formed on the nozzle adjacent the closed endand positioned approximately at right angles to the longitudinal axis ofthe nozzle and atomizer and an induction nozzle mounted in the air inletextension to induce a flow of air therethrough.

2. The combination with a centrifugal atomizer and means for deliveringfuel thereto, of a main nozzle surrounding the atomizer, an inductionnozzle connected with fluid under pressure through the induction nozzleto induce the flow of air through the main nozzle, said induction nozzlehaving its axis transverse to and at one side of the main nozzle axis sothat a swirling movement in the direction opposite to the rotation ofthe-atomizing cup will be imparted to the air induced.

3. In an oil burner, a centrifugal atomizing cup, a hollow shaftsupporting the cup, a nozzle surrounding the cup and shaft and enclosingthe same, said nozzle being open at one end and closed at the oppositeend, a bearing member supported by the nozzle in which the shaft isjournalled, an air inlet extension formed on the nozzle adjacent theclosed end, said air inlet extension being arranged at one side of thenozzle and at approximate right angles to the longitudinalhollow shaftand atomizer support-ed thereby, and means for delivering oil to theatomizing cup through the hollow shaft.

4:. The combination with a centrifugal atomizer, and means fordelivering fuel thereto, of a main nozzle surrounding the atomizer, saidmain nozzle being open at one end and closed at the opposite end, saidatomozer projecting through the open end of the main nozzle, aninduction nozzle mounted adjacent the closed end of the main, nozzle,and means for passing a fluid under pressure through the inductionnozzleto induce a flow of air through the main nozzle.

5. The combination with a centrifugal atomizer, and means for deliveringfuel thereto, of a main nozzle surrounding the atomizer, said mainnozzle-being open at one end and closed at the opposite end, aninduction nozzle mounted adjacent the closed end of the main-nozzle, andmeans for passing a fluid under pressure through the iniganeaio nectedwith the nozzle for delivering a cur-' rent of alr, said means beingdisposed between the ends of the nozzle to impart a swirling movement tothe air as it discharges through the nozzle and in a direction oppo-.

site to the rotation of the atomizer. v

7.1m a burner of the character described, a centrifugal atomizer, meansfor delivering fuel thereto, a nozzle surrounding the atomizer, saidnozzle being opened at one end and closed at the other end, and meansconnected to the side of the nozzle forwardly of the closed end thereoffor delivering a fluid under ressure to the nozzle to induce the flow ofair through the nozzle.

8. In a burner of the character described, a centrifu al atomizer, meansfor delivering fuel t ereto, a nozzle surrounding the atomizer, saidnozzle. being opened at one end and closed at the other end, and meansconnected with the nozzle at one side thereof adjacent totheclosed endthereof for delivering a current of air in a direction at right anglesto the longitudinal axis of the nozzle to impart a swirling movement tothe air as it discharges through the nozzle and at a direction oppositeto the rotation of the atomizer. v

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

' WILLIAM R. RAY.

Witnesses: v

JOHN H. Hrnnmo, I W. W. Heater.

